Here is the full list of all 38 Thymesia achievements.
Unlock all achievements.
Break 1000 barrels.
Empty the first health bar of Varg in the tutorial.
Reach the "Harmonized Force" ending.
Reach all endings.
Reach the "Power of Cleasing" ending.
Reach the "Chaotic Power" ending.
Reach the "Blessing of Pure Blood" ending.
Craft all potion recipes.
Collect all entries in the collection.
Collect all potion ingredients.
Reach max level.
Collect all lore.
Finish all levels.
Reach the "Power of Vile Blood" ending.
Defeat Corvus.
Unlock all plague weapons.
Defeat Urd.
Collect all story bits.
Finish "Hermes Fortress" level.
Defeat Varg.
Fully upgrade a potion.
Defeat Sound of the Abyss.
Defeat any boss without using potion.
Craft a potion recipe for the first time
Finish "Royal Garden" level.
Defeat The Hanged Queen.
Defeat Mutated Odur.
Defeat God of the Fools.
Fully upgrade a plague weapon for the first time.
Finish "Sea of Trees" level.
Defeat Odur.
Unlock a plague weapon for the first time.
Dead for the first time.
Start recalling for the first time.
Finish the tutorial.
Rest at the beacon for the first time.
Reave a plague weapon for the first time.